Is evidence that describes the involvement of several travel agencies not named in the indictment admissible as evidence of the same crime?

Evidence is considered proof of the charged crime, rather than proof of "other crimes," when it is inextricably intertwined with evidence concerning the charged crime. United States v. Mundi, 892 F.2d 817, 820 (9th Cir.1989) (citing United States v. Soliman, 813 F.2d 277, 278 (9th Cir.1987)). In Mundi, the defendant had been convicted of fraud for devising a scheme involving eleven travel agencies. We determined that testimony which described the involvement of several travel agencies not named in the indictment was fully admissible as evidence of the same crime. 813 F.2d at 278.